Well... Not to be "that guy", but I think the forums are a bit dead because of linear research, completely random level of challenge, which is totally dependent on available resources, encounters with other races and when/if "they" show up. Tactics aren't very deep, and the choices are really that many or exciting.
Once I started seeing the same stuff over and over, and doing the same thing over and over, I lost interest.
DW is an ambitious game, and a good one in many ways, but it's suprisingly easy to get bored with it.
I'm obviously not speaking for everyone, but I think the game, when played for a while, is a bit dead.
I know that comes off really negative, but the potential of DW is not near to being realised. Lack of support for mods is just the most glaring example of how to lose active community members.
A final note to new players, though: If you are interested in the genre and/or settingm do check it out. It is worth the price tag. The game definitely deserves more than a casual look. It is pretty unique with it's ai driven gameplay and epic scale.